import {getToken} from './Authority';
import BaseUrl from '../config/BaseUrl';
import {Portal, Toast} from '@ant-design/react-native';
import {navigate} from '../navigator/RootNavigation';

let needLoadingRequestCount = 0;
const showFullScreenLoading = (text) => {
  if (needLoadingRequestCount === 0) {
    startLoading(text);
  }
  needLoadingRequestCount++;
};

const tryHideFullScreenLoading = () => {
  if (needLoadingRequestCount <= 0) {
    return;
  }
  needLoadingRequestCount--;
  if (needLoadingRequestCount === 0) {
    endLoading();
  }
};

let loading = null;

const startLoading = (text) => {
  loading = Toast.loading(text || '加载中……', 0);
};

const endLoading = () => {
  Portal.remove(loading);
};

const codeMessage = {
  200: '服务器成功返回请求的数据。',
  201: '新建或修改数据成功。',
  202: '一个请求已经进入后台排队（异步任务）。',
  204: '删除数据成功。',
  400: '发出的请求有错误，服务器没有进行新建或修改数据的操作。',
  401: '用户没有权限（令牌、用户名、密码错误）。',
  403: '用户得到授权，但是访问是被禁止的。',
  404: '发出的请求针对的是不存在的记录，服务器没有进行操作。',
  406: '请求的格式不可得。',
  410: '请求的资源被永久删除，且不会再得到的。',
  422: '当创建一个对象时，发生一个验证错误。',
  500: '服务器发生错误，请检查服务器。',
  502: '网关错误。',
  503: '服务不可用，服务器暂时过载或维护。',
  504: '网关超时。',
};

const checkStatus = (response) => {
  console.log(response, '53');
  if (
    (response.status >= 200 && response.status < 300) ||
    // 针对于要显示后端返回自定义详细信息的status, 配置跳过
    response.status === 400 ||
    response.status === 500
  ) {
    return response;
  }
  const errortext = codeMessage[response.status] || response.statusText;
  if (response.status !== 401) {
  }
  const error = new Error(errortext);
  error.name = response.status;
  error.response = response;
  throw error;
};

const checkServerCode = (response) => {
  console.log(response.code === 403, 'response');
  if (response.code >= 200 && response.code < 300) {
    return response;
  }
  // do something
  if (response.code === 400) {
  } else if (response.code === 403) {
    navigate('Login');
    return response;
  } else if (response.code === 404) {
  } else if (response.code === 500) {
    if (response.msg === "未登录或登录已超时。") {
      navigate('Login');
    }
    return response;
  }
  return response;
};

/**
 * Requests a URL, returning a promise.
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [option] The options we want to pass to "fetch"
 * @return {object}           An object containing either "data" or "err"
 */
export default async function request(url, option) {
  const options = {
    ...option,
  };

  const defaultOptions = {
    // credentials: 'include',
    mode: 'cors',
  };
  const newOptions = {...defaultOptions, ...options};

  newOptions.headers = {
    ...newOptions.headers,
    Referer: 'http://www.zhangyinmed.cn/',
  };
  const token = await getToken();

  if (token) {
    newOptions.headers = {
      ...newOptions.headers,
      // token鉴权
      Cookie: `Admin-Token=${token}`,
      // 客户端认证
      Authorization: `Bearer ${token}`,
    };
  }
  if (
    newOptions.method === 'POST' ||
    newOptions.method === 'PUT' ||
    newOptions.method === 'DELETE'
  ) {
    if (!(newOptions.body instanceof FormData)) {
      newOptions.headers = {
        Accept: 'application/json',
        'Content-Type': 'application/json;charset=utf-8',
        ...newOptions.headers,
      };
      newOptions.body = JSON.stringify(newOptions.body);
    } else {
      // newOptions.body is FormData
      newOptions.headers = {
        Accept: 'application/json',
        'Content-Type': 'multipart/form-data;charset=utf-8',
        ...newOptions.headers,
      };
    }
  }

  if (newOptions.loading) {
    showFullScreenLoading();
  }
  console.log(newOptions);
  return (
    fetch(BaseUrl.requestUrl + url, newOptions)
      .then(checkStatus)
      // .then(response => cachedSave(response, hashcode))
      .then((response) => {
        if (newOptions.loading) {
          tryHideFullScreenLoading();
        }
        // DELETE and 204 do not return data by default
        // using .json will report an error.
        if (newOptions.method === 'DELETE' || response.status === 204) {
          return response.text();
        }
        return response.json();
      })
      .then(checkServerCode)
      .catch((e) => {
        console.log(e, 'catch');
        if (newOptions.loading) {
          tryHideFullScreenLoading();
        }
        console.log(e.response);
        const status = e.name;
        if (status === 401) {
          navigate('Login');
          return;
        }
      })
  );
}
